Two Decades of Carbon Flux from Forests of the Pacific Northwest

arth's climate is greatly influenced by carbon dioxide concentrations in the atmosphere, which have increased by approximately 25% since the dawning of the Industrial Revolution, when fossil fuel combustion accelerated greatly (IPCC 1990). Another important anthropogenie SOUfee of atmospheric carbon 15 associated with defcrestanon, especially in primary forests, which can stor e large amounts oi carbon in rhe form of organic biomass Attempts (0 balance the globalcarbon budget have indicared that 20%-50% (1-3 Pg/yr) of the carbon released to the atmosphere from anthropogenie sources cannot be accounted for or fully explained (Dale et a1.